WICHITA, Kan. (AP) — Spirit AeroSystems has announced it will issue layoff notices to about 150 salaried and management workers in Wichita even as it continues to hire more factory workers.

The company said Thursday the layoffs are in addition to an unspecified but significant number of salaried employees who have expressed interest in voluntary retirement and voluntary layoff programs.

At the same time it is reducing its salaried and management employees, the company says it is also hiring “hundreds” more factory workers. Those jobs are for assembly, composite, metals and process mechanics as well as quality inspectors.

Spirit says it is trying to balance its workforce to meet record demand from its customers and become more competitive.

The company says it ramping up production for later this year and early 2014.